Privacy

Last updated 11 November 2026.

Your files

PDFs and photos are processed only in your browser. They are not uploaded to PDFUnderKB, not stored on a server, and not sent to a conversion service. Closing the tab drops the in-memory copy. The PDF you download is saved by your own device.

A single file over 8 MB, or more than 8 pages, is rejected before the heavy work starts. That limit is there so a phone does not run out of memory. It is not a copy of your file.

What the site itself can see

The pages are static. A normal visit does not create an account. The host that serves the files may keep standard server logs, such as IP address, browser, and the page requested. Those logs belong to the host. This site has no file server.

Advertising

Advertising is not switched on. The dashed boxes marked Advertisement are empty placeholders. They sit below the tool, not between you and the choose or download buttons. If ads are added later, they still will not be placed inside the tool, and the privacy page will name the network.

Analytics

Both tools below stay off until a token is set in the site config or in the build environment. Local development, automated tests, and preview hosts do not send them.

On pdfunderkb.com, Cloudflare Web Analytics can count page views. It does not use a cookie, and it does not see your file. It is not loaded if the browser sends Do Not Track, or if the browser looks like an automated test.

The same site can use PostHog for anonymous usage: which size you picked, whether the PDF fit, and whether you downloaded. The script is loaded after the page is idle, so it does not block the tool. It stores an anonymous id in a cookie and in local storage so those steps stay together. It does not receive the file, the file name, or the bytes. Session replay, when PostHog is on, masks what you type and blocks images, canvases, and the file picker. If your browser sends Do Not Track, PostHog is not loaded.

Contact

If you email [email protected], that message is ordinary email. It is used to answer you. Do not attach your PDF or photos. Describe the size limit and what the page said.

Children

The tool is for applicants. It does not ask for a date of birth or an identity number. Do not use it on someone else's document without their knowledge.